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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e193bafa2a190746a96af9fb999d9a2539f38a34c5f1bbb98e2ab319d97ea51' 
  AND token = 'juCXj7Lf2/3itDd8TgNUnLPqEsIQjQVcYC0ZZtsVtQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}